Ceramic cutting material reinforced by whiskers

Details Ceramic cutting material reinforced by whiskers Ceramic cutting material reinforced by whiskers

1989-09-05

1991-10-01

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 96, 501153, C04B 3502, C04B 3508

Patent

active

050533630

ABSTRACT:
A ceramic cutting insert including whiskers for chip forming machining of steel and having improved mechanical, thermal and wear properties. The insert comprises an oxide based matrix and 5-50% by volume, preferably 10-40% by volume, of homogeneously dispersed whiskers of a solid solution of nitride and oxide of aluminum, preferably of the cubic aluminum oxynitride spinel (AlON). A part of the whiskers constituent may be replaced by whiskers of silicon carbide. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whisker reinforced cutting material shows an improved toughness behavior compared to non-whisker containing ceramic materials.

REFERENCES:
patent: 3890250 (1975-06-01), Richerson
patent: 4636374 (1987-01-01), Kurihara et al.
patent: 4745091 (1988-05-01), Landingham
patent: 4761388 (1988-08-01), Oguri et al.
patent: 4777155 (1988-10-01), Baba et al.
patent: 4789277 (1988-12-01), Rhodes et al.
patent: 4801564 (1989-01-01), Baba
patent: 4804645 (1989-02-01), Ekstrom

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